Post-processing Techniques in Antenna Measurement by Manuel Sierra Castaer;Lars J. Foged;

Author:Manuel Sierra Castaer;Lars J. Foged; [Неизв.]
Language: eng
Format: epub
ISBN: 9781785615375
Publisher: Institution of Engineering & Technology
Published: 2019-12-12T21:00:00+00:00

Figure 5.4 MVG SH600 dual-ridge horn

Figure 5.5 Directivity radiation pattern cuts of the MVG SH600 dual-ridge horn at 3 GHz. E-plane co-polar (solid-orange); H-plane co-polar (dash/dotted-blue); diagonal-plane co-polar (dotted-green); diagonal-plane cx-polar (dashed-yellow)

According to (5.2) and (5.3), the minimum number of modes needed to represent such antenna at 3 GHz with an accuracy of is given by and . Consequently, according to (5.4) and (5.5), the minimum sampling required to measure such antenna is approximately and .

The computed SWCs of the simulated horn at 3 GHz are shown in Figure 5.6 as 2D maps where the n-mode and m-mode variations are reported, respectively, along the vertical and horizontal axes. TM-modes ( or simply ) are shown in Figure 5.6(a) while TE-modes ( or simply ) are shown in Figure 5.6(b). Both mode maps are normalized with respect to the total radiated power given by (5.15):

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